Zzz vs Zuz - What's the difference?

zzz | zuz |

As verbs the difference between zzz and zuz

is that zzz is (onomatopoeia) to sleep while zuz is to bruise, jam.

is implies that a particular character is asleep.

(en interjection)

Implies that a particular character is asleep.

(onomatopoeia) To sleep.

* H. G. Wells

He lay back on his pillow, made a faint zzzing sound that ceased, and presently and quite quietly he died — greatly comforted by my assurance.